Northstar Engines and System Technical Discussion Discussion, Water pump drive pulley in Cadillac Engine Technical Discussion; Hey guys, does anyone know where I can get one of these pulleys for my 2000 DTS for cheap? RockAuto?...

Re: Water Pump Pulley

There are 3 pulleys - the drive pulley, cam mounted; the tensioner pulley, bolted to the tensioner spring arm; and the water pump pulley, pressed on and not available separately from the pump assembly.

Yep, RockAuto - Tensioner pulley in "Belt Drive", WP (drive) pulley in "Cooling System" as well as the water pump assembly.

Re: Water Pump Pulley

That pulley is pressed TIGHTLY onto the left (front) bank intake cam extension. It takes a special puller/installer and caution to replace it. Do NOT bang, tap, twist, or bend - use the correct puller on the pulley hub groove. If it has never been fooled with the black plastic protective cover is probably still in place. Remove it with a suitable Torx to reveal the chamfer and threads used for pull/install.

Re: Water Pump Pulley

Originally Posted by Submariner409

That pulley is pressed TIGHTLY onto the left (front) bank intake cam extension. It takes a special puller/installer and caution to replace it. Do NOT bang, tap, twist, or bend - use the correct puller on the pulley hub groove. If it has never been fooled with the black plastic protective cover is probably still in place. Remove it with a suitable Torx to reveal the chamfer and threads used for pull/install.

Re: Water pump drive pulley

www.rockauto.com, make, model, year, engine - either "belt drive", "engine" or "cooling". Click the small picture for a larger view.

Dorman is a huge automotive product distributor and, like most others, contracts with thousands of suppliers - you just need to know the worth and quality of each product. Some are obviously inferior to OEM.

You want to bring water to your eyes ??? Look up the pricing for the Kent-Moore GM Northstar water pump drive pulley removal and install equipment.

Sometimes you can get lucky at a GM dealership closing auction. Bring certified checks.

Re: Water pump drive pulley

Unless the tensioner spring or arm is damaged, the water pump tensioner pulley is replaceable alone. Either RockAuto (belt drive, tensioner pulley, 3-rib). As per the picture.

Follow the instructions posted earlier in this thread if the tensioner pulley caused damage to the large drive pulley on the cam extension.

Why didn't you do the work when you started this thread 4 months ago ??? You could now have (and might have) caused much more engine damage than you know. Here's a Northstar hint: Fix the small stuff NOW before the growing snowball takes out the entire engine.